Clinker crusher for stokers



Nm 11, 1941. HOFFMAN 2,262,324

CLINKER GRUSHER FOR STOKERS Filed April 16, 19 40 2 Sheets-Sheet l Nov.11, 1941. F FM N 7 2,262,324

CLINKER cRusHER FOR STOKERS I Filed April 16, 1940 2 Sheets- Sheet 2 Inventqr A iiorney Patented Nov. 11, 1941 UNITED STATES PATENT OFFICE2,262,324 CLINKER. CRUSHER FOR STOKERS Frederick J. Hoffman, Allentown,Pa. Application April 16, 1940, Serial No. 329,977

3 Claims.- ((1110-45) The present invention relatesto new and usefulimprovements in coal stokers burning anthracite coal and has for itsprimary object to provide a clinker crusher adapted for periodicalmovement into and out of position with respect to the bed of coalscontained in the firepot and embodying means for removing and crushingthe clinkers which form at the edge of the bed of coals, and also topack the bed so as to eliminate and partially close airholes in thesurface of the bed, thereby preventing cold air from the forced draftfan of the stoker from chilling the boiler. I

A further object of the present invention is to provide a clinkercrusher of this character constructed in the form of a concaved plateadapted to substantially conform to the shape of the bed of firecontained in the firepot, and having perforations in said plate toprevent smothering of the fire when the crusher is moved into positionwith respect to the fire.

A still further object is to provide an appara-. tus of this characterof simple and practical construction, which is efficient and reliable inperformance, relatively inexpensive to manufacture and install inoperation and otherwise well adapted for the purposes for which the sameis intended.

Other objects and advantages reside in the dc tails of construction andoperation as more fully hereinafter described and claimed, referencebeing had to the accompanying drawings forming part hereof, wherein likenumerals refer to like parts throughout, and in which- Figure 1 is aside elevational view. Figure 2 is a front elevational view. Figure 3 isa vertical sectional view through the plate forming theclinkercrusher,and

a sleeve II in the opposite ends of which the sections of the arm areinserted and adjustably secured in position by set screws l 2.

To the outer end of the section 9 is secured the clinker crushing plate13 which is in disk form and concaved at its under surface and ofcovering position.

of clinkers in the fire.

a diameter substantially equal to the diameter of the firepot 5.

The plate i3 is formed with a plurality of slotted openings I4 as wellas a plurality of perforations l5.

The rock shaft 1, at its end portions, is provided with a pair-ofangular extensions I6 projecting laterally from the shaft and on theouter ends thereof are adjustably secured weights H. The extensions 16and weights I! are positioned outwardly of the walls of the furnace 6and also disposed on the shaft, outwardly of the furnace, is an angularextension [8 extending in a direction opposite from the extensions I6and having an upturned extremity 19 provided with a head 20 and withwhich is engaged the free end of a, lever 21 adapted for actuation by asuitable intermittent mechanism (not shown) for periodically exerting adownward movement on the head 20 whereby to rock the shaft I in adirection for lowering the plate 13 into engagement with the firepot 5.

The edge of the plate I3 is adapted to engage clinkers formed on theedge of the firepot and thus to break and remove the clinkers therefrom,the concaved under surface of the plate [3 conforming substantially withthe raised contour of the bed of fire contained in the firepot wherebyto pack the fire and to close any air holes that might be'formed thereinthrough the formation The plate thus serves to shape the bed of fire andkeep the same free from clinkers. I v i l The weights I! serve thepurpose of raising the plate upon release by the operating lever 21. Itis believed the details of construction, advantages andmanner ofoperation of the device will be readily understood from the foregoingWithout further detailed explanation. Having thus described theinvention, what I claim is: l

1. A clinker crusher for firepots comprising a disk-like perforatedplate member having a concaved under surface and means for moving theplate into covering position upon the pot for compressing the firecontained therein, certain of said perforations, being formed in theside walls of the concavity of the plate to prevent clogging of theperforations by cinders when compressed bythe plate, said perforationsproviding a draft for the fire when the plate is in 2. A clinker crusherfor surface, a plurality of arcuate slotted openings in firepotscomprising a disk-like plate member having a concaved under the sidewalls of the concavity of the plate, and means for moving the plate intocovering position upon the pot for compressing the fire containedtherein, said slotted openings providing ventilation for the fire toprevent smothering thereof when the plate is in covering position.

3. A clinker crusher for firepots comprising a rock shaft, adapted forperiodical rocking actuation, a sectional arm extending laterally fromthe shaft, means adjustably connecting the sections of the arm and adisk-like plate member carried by the arm and having a concaved undersurface adapted for movement by the shaft into covering position uponthe pot for compressing the fire contained therein, said plate memberhaving arcuate slots in its side wall out of the direct path of cinderswhen compressed by the plate to prevent clogging of the slots and thusprovide ventilation for the fire when the plate is in covering position.

FREDERICK J. HOFFMAN.

